首先提出大陆漂移说法的人是( )
A.李四光
B.麦哲伦
C.魏格纳
D.哥伦布
答案:C
本题主要考查的是海陆变迁的相关知识。首先提出大陆漂移说法的人是魏格纳。
—That must have been a long trip.
—Yeah, it ________ us a whole week to get there.[ ]
A. takes
B. has taken
C. took
D. was taking
从决策的重复性或新奇性看,可分为程序化决策和非程序决策。